US4778712A - Packaging films for photosensitive materials - Google Patents

Packaging films for photosensitive materials Download PDF

Info

Publication number
US4778712A
US4778712A US07/042,566 US4256687A US4778712A US 4778712 A US4778712 A US 4778712A US 4256687 A US4256687 A US 4256687A US 4778712 A US4778712 A US 4778712A
Authority
US
United States
Prior art keywords
ldpe
packaging film
light
polyethylenic polymer
carbon black
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US07/042,566
Other languages
English (en)
Inventor
Mutsuo Akao
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Application granted granted Critical
Publication of US4778712A publication Critical patent/US4778712A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B32B15/085—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C3/00—Packages of films for inserting into cameras, e.g. roll-films, film-packs; Wrapping materials for light-sensitive plates, films or papers, e.g. materials characterised by the use of special dyes, printing inks, adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2264/00—Composition or properties of particles which form a particulate layer or are present as additives
    • B32B2264/10—Inorganic particles
    • B32B2264/107—Ceramic
    • B32B2264/108—Carbon, e.g. graphite particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • B32B2323/046—LDPE, i.e. low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2553/00—Packaging equipment or accessories not otherwise provided for
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1334—Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.]
    • Y10T428/1338—Elemental metal containing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2813—Heat or solvent activated or sealable
    • Y10T428/2817—Heat sealable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31681—Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31786—Of polyester [e.g., alkyd, etc.]
    • Y10T428/31797—Next to addition polymer from unsaturated monomers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers
    • Y10T428/31909—Next to second addition polymer from unsaturated monomers
    • Y10T428/31913—Monoolefin polymer

Definitions

  • the present invention relates to a laminated film for packaging photosensitive materials, which makes use of a polyethylenic film, especially L-LDPE (low-pressure-processed, linear low-density polyethylene).
  • L-LDPE low-pressure-processed, linear low-density polyethylene
  • L-LDPE low-pressure-processed linear low-density polyethylene
  • HDPE low-pressure-processed high-density polyethylene
  • L-LDPE low-pressure-processed linear low-density polyethylene
  • L-LDPE i.e., a copolymer of ethylene with other alpha-olefin
  • Packaging materials for the complete shielding of light are used to package light-sensitive materials, viz., photosensitive materials which lose their quality upon exposure to light.
  • the properties then demanded include gas-shielding properties, light-shielding properties, moistureproofness, various physical strength (breaking strength, tear strength, impact perforation strength or extent of impact perforation, Gelbo test strength, etc.), heat sealability (heat seal strength, hot sealability, etc.), antistatic properties and the like. It is difficult for a single film material to possess all the aforesaid properties. For that reason, use has generally been made of composite laminated films comprising polyethylene films blended therein with carbon black, pigments, etc., and flexible sheets formed of, e.g., paper, aluminum foils, cellophane or the like.
  • the prior art films have still had the disadvantages that their physical properties are not sufficient, i.e., they are torn or perforated during packaging, they peel off at the heat sealed portions, etc. Furthermore, the addition of a light-shielding substance such as carbon black results in a lowering of physical strength. It has been required, therefore, that the amount of the light-shielding substance to be added be limited to about 3%, while the films have a thickness exceeding 70 microns. This leads to bulky packaging, increased rigidity of the films, deterioration of packaging workability, and rises in the cost.
  • the representative packaging materials for photosensitive materials there have been available laminates wherein two layers, a flexible sheet layer and a carbon black-containing polyethylene (LDPE) film layer are laminated on both sides of an aluminum foil as shown in FIG. 3.
  • the reason for using the aluminum foil is to eliminate the disadvantages that the thermoplastic resin film is poor in moistureproofness, likely to be electrically charged or to be peeled-off, etc.
  • the results are, on the contrary, that tear strength, extent of impact perforation and Gelbo test strength deteriorate considerably, as compared with the sole use of thermoplastic resin films and, in particular, a breakage problem arises in the packaging of heavy articles.
  • the thickness of the carbon black-containing LDPE films has been fixed at 70 microns or more.
  • 58-132555 a light-shielding film comprising an L-LDPE polyethylenic polymer and no less than 1% by weight of a light-shielding substance, wherein a low-pressure-processed linear low-density polyethylene (L-LDPE) accounts for no less than 50% by weight of the overall polyethylenic polymer.
  • L-LDPE linear low-density polyethylene
  • the present invention has for its object to provide a packaging film for photosensitive materials, which excels in physical strength such as tear strength, impact perforation strength, Gelbo test strength, etc., with improvements in such moistureproofness, gas-shielding properties and antistatic properties of the films formed of plastics alone that have been poor.
  • the present invention provides a packaging film for photosensitive materials, which is a laminated film comprising at least three layers of an aluminum foil and two L-LDPE polyethylenic polymer layers laminated onto both sides of said aluminum foil, and in which:
  • L-LDPE polyethylenic polymer layers contain 50% by weight or more of a low-pressure-processed, linear low-density polyethylene resin (L-LDPE),
  • one or more of said L-LDPE polyethylenic polymer layers contain 0.5% by weight or more of a light-shielding substance
  • said two L-LDPE polyethylenic polymer layers, formed on both sides of said aluminum foil, have a thickness ratio of no higher than 50%
  • said two laminated film has a moistureproofness or moisture permeability of no higher than 10 g/m 2 24 hr (40° C., 90% RH).
  • One feature of the present invention is that the L-LDPE polyethylenic film layers having the given requirements are laminated onto both sides of the aluminum foil in such a manner that the latter is sandwiched between the former. Even though the same two layers be used, if two L-LDPE layers are applied on one side, rather than both sides, of the aluminum foil, such improvements in strength, especially, impact performation strength as achieved in the present invention are not then be introduced. In the case where the same L-LDPE resin layer is applied by a doubled thickness or thicker, the curl properties deteriorate to an extremity such that the film is tubularly rolled up. Thus the bag-making or packaging processing therefrom becomes almost impossible.
  • the impact perforation strength tested on the reverse side of the L-LDPE side markedly decreases (almost a half or less).
  • a thicker layer would be required for attaining the requisite strength, however, such measure is disadvantageous in view of cost, bulkiness and a still deteriorated curling.
  • Such thick layer structure will also entail deterioration in the moistureproofness due to moisture penetration through the thick cut section.
  • the tested results should be referred to for comparison, e.g., the comparative sample C5 (Table 1) has a 100 microns thick L-LDPE layer on one side of aluminum foil and has a low tear strength and impact perforation strength, while the inventive sample 6 exhibits almost doubled or higher strengths.
  • the laminated films of the present invention excel in tear strength, flexibility, impact perforation strength, heat seal strength, hot peel strength, slip properties, Gelbo test strength, drop strength, moistureproofness, gas barrier properties, antistatic properties, light-shielding properties, etc., and so they are best-suited for the packaging of photographic photosensitive materials.
  • Table 1 compared with the conventional laminated films relying upon LDPE films, the inventive films show markedly improved tear strength, impact perforation strength, flexibility, heat seal strength, hot peel strength, slip properties, Gelbo test strength, drop strength, etc., even though they are of the same thickness and structure.
  • the films having such properties are useful for the packaging of photographic photosensitive materials which are sensitive to, conditions such as humidity, gases (oxygen gas, sulfurous acid gas), static electricity, etc.
  • any suitable packaging films for photosensitive materials are not obtained even by increasing the thickness thereof to an extreme extent, or even by adding an electrically conductive substance thereto.
  • films comprising a mere laminate of a single L-LDPE film and an aluminum foil are useful for the packaging of photographic photosensitive materials which are sensitive to, conditions such as humidity, gases (oxygen gas, sulfurous acid gas), static electricity, etc.
  • FIGS. 2 and 3 show an example of the conventional film for the packaging of photosensitive materials.
  • FIGS. 1 and 4 to 6 show L-LDPE control samples.
  • FIGS. 7 to 13 show the examples of the inventive films of the packaging for photosensitive materials.
  • FIG. 13 is a sectional view of a packaging material for the packaging of photosensitive materials, which is a typical example of a double bag comprising an outer sheet A and an inner sheet B composed of the inventive materials of the layer structure shown in FIG. 2.
  • FIG. 14 is a partly cut-away perspective view of a flat bag formed of the inventive packaging material.
  • FIG. 15 is a sectional view of a photographic photosensitive material which is completely sealed and packaged.
  • FIG. 16 is a sectional view of a double-gussetted bag sealed therein with a photosensitive material, the inner sheet of said bag being formed of the inventive packaging material.
  • FIG. 17 is a sectional view of a monochrome or color roll-photosensitive material (photographic paper, cinefilms, printing films, indirect X-ray films, microfilms, etc.) in packaged form.
  • a monochrome or color roll-photosensitive material photographic paper, cinefilms, printing films, indirect X-ray films, microfilms, etc.
  • L-LDPE polyethylenic polymer referred to in the present disclosure shall embrace mixed polymers (blends) containing no less than 50% by weight of L-LDPE and at least one thermoplastic resin.
  • the thermoplastic resins embrace olefinic polymers, ethylene copolymers with other various resins, e.g., high-, and low- or middle-pressure-processed polyethylenes, polypropylene, EEA, EVA, polybutene, polyisobutylene rubber or the like.
  • a most preferred thermoplastic resin is LDPE.
  • L-LDPE refers to a low-pressure-processed, low- or medium-density polyethylenic polymer, which is a copolymer obtained by the copolymerization of ethylene with an alpha-olefin having 3-13, preferably 4-10 carbon atoms, and is of the structure having a short branch in the linear chain.
  • L-LDPE used in the present invention is commercially available under the trade names of UNIPOLE (UCC), DOWLEX (Dow Chemical), MARLEX (Phillips), SOLEAR (Du Pont, Canada), ULTZEX (Mitsui Petroleum Chemical Ind.), and such.
  • the alpha-olefin used includes butene-1, octene-1, hexene-1, 4-methyl-pentene-1, etc., which are employed in an amount of about 0.5 to 10 mol % on the total polymer.
  • L-LDPE is generally supposed to have a density nearly equal to that of the low- and medium-pressure-processed polyethylene, and most commercially available L-LDPE has a density ranging from 0.91 to 0.95 g/cm 3 .
  • the density is preferably in a range of 0.91 to 0.935 g/cm 3
  • the melting point MI is preferably in a range of 0.1 to 18 g/10 minutes.
  • light-shielding substance referred to in the present disclosure shall embrace any granular or powdery substance which is mixed with and dispersed through the L-LDPE polyethylenic polymer, and does not transmit visible (and ultraviolet) light therethrough.
  • the light-shielding substance that can be used in the present invention is inorganic or organic pigments such as various carbon black, iron oxides, zinc flower, titanium oxide, clay, aluminum powders, aluminum paste, calcium carbonate, mica, barium sulfate, talc, cadmium oxide pigments, chrome yellow, red iron oxide, cobalt blue, copper phthalocyanine base pigments, monoazo or polyazo base pigments, aniline black.
  • heat stabilizers, ultraviolet stabilizers, antioxidants, antistatics, lubricants, anti-blocking agents, etc. may be added to the L-LDPE polyethylenic polymer layers according to the conventional manner.
  • the light-shielding substance may be used in vairous forms such as powdery coloring matters, pasty coloring matters, lubricating coloring matters, master batches, dyes and pigments, and colored pellets.
  • the amount of the light-shielding substance to be added for instance, that of carbon black which is typical of the light-shielding substance, an increase in that amount assures improvements in light-shielding properties.
  • thermoplastic resins With the prior art thermoplastic resins, however, there were drops of various strength. For that reason, there was no choice but to reduce the amount of carbon black to about 3%, in the case where it was used with the packaging films for photosensitive materials. To add to this, a thickness of no less than 70 microns should be given to the films to make up for their strength. This resulted in bulky packaging and an increase in the film strength, which caused deterioration of workability in packaging and created a problem in connection with resources savings.
  • the present inventor investigated the influence of the incorporation of carbon black, by using, in lieu of polyethylene, L-LDPE that was problematic if employed for packaging films. In consequence, it was found that, where carbon black was incorporated into L-LDPE, the unexpected results that the physical strength increased considerably were obtained, contrary to the case of high-pressure-processed low-density polyethylene (hereinafter called LDPE).
  • LDPE high-pressure-processed low-density polyethylene
  • LDPE Compared with L-LDPE, LDPE originally has a lower strength, and a drop of strength becomes very marked, especially where carbon black is added. On the contrary, with L-LDPE there is a marked improvement in strength by the addition of carbon black.
  • carbon black to be added begins to appear in an amount of 0.5% by weight, becomes noticeable in an amount of 1% by weight, and becomes more marked in an amount exceeding 3% by weight.
  • a further increase in that amount gives rise to an increase in the number of fisheyes, and results in a rise in the cost.
  • a proper amount of carbon black is no less than 0.5% by weight, and more preferably 1 to 15% by weight.
  • the carbon black that is typical of the light-shielding substance used in the present invention is classified into channel-process carbon black, gas furnace-process gas black, thermal-process carbon black, etc. According to its raw material, it is classified into gas black, oil furnace black, anthracene black, acetylene carbon black, oil soot, palm soot, animal black, vegetable black, etc.
  • furnace carbon black is desired in view of the light-shielding properties, cost and improvements in physical properties. It is also desired to use acetylene carbon black and Ketschen carbon black as the light-shielding material which is costly, but produces an antistatic effect.
  • the carbon black that has the most-limited adverse influence upon photosensitive materials is oil furnace carbon black, 50% by weight or more of which has a particle size of no more than 30 microns, and the pH of which is 5 to 9. If necessary, mixing of the former carbon black with the latter, or two or more thereof (different in the type, size, pH, etc) can be undertaken depending upon the required properties.
  • the light-shielding substances may be incorporated into the polyethylenic polymers in various forms, however, masterbatching is desirous in view of the cost and for the purpose of prventing environmental pollution at working areas.
  • 40-26196 discloses a process for preparing a polymer/carbon black masterbatch by dispersing carbon black in a solution of a polymer in an organic solvent
  • Japanese Patent Kokoku Publication No. 43-10362 teaches a process for preparing a masterbatch by dispersing carbon black in polyethylene.
  • carbon black is mixed with LDPE (high-pressure-processed low-density polyethylene) in a high concentration of 2% by weight or higher, generally 10% by weight or higher, to form a masterbatch.
  • the masterbatch is weighed in such a way that the carbon black content of the final product reaches the given value, and is mixed with L-LDPE.
  • L-LDPE low-density polyethylene
  • the combination system of LDPE and L-LDPE is superior to the single system of L-LDPE in the processability at film preparation.
  • L-LDPE may be used to cut down the mixing cost of carbon black.
  • the masterbatching resin is preferably a polyolefinic resin having a melt index higher than that of L-LDPE in view of uniform mixing. It is to be noted that this holds substantially for the use of another light-shielding substances.
  • Japanese Patent Kokai Publication No. 55-117638 discloses a method for modifying the structure of a screw, which is adapted to reduce the amount of load impressed thereon and heat generated by the revolution thereof.
  • a conventional T-die or inflation molding machine can be used without making any modification thereto, according to the masterbatching method of the present invention.
  • the amount of L-LDPE is above that of L-LDPE in the present invention, carbon black produces no sufficient effect upon increases in strength. It is thus required that the amount of L-LDPE contained in the overall polyethylene polymer be preferably 50% or higher, more preferably 60% or higher.
  • the L-LDPE polyethylenic polymer layer may be in the form of either a L-LDPE non-oriented film layer, or a mono- or bi-axially oriented film layer (connoting mono- or bi-axially oriented films).
  • the two L-LDPE polyethylenic polymer layers applied on both sides of an aluminum foil may be identical or different in the thickness, degree of orientation, factor of stretching, direction of orientation or direction of stretching as well as the composition and the amount of the light-shielding substance to be added, as far as they are within the purport as defined in the appended claims.
  • a longitudinally monoaxially stretched L-LDPE film layer and a transversely monoaxially stretched L-LDPE film layer may be laminated on both sides of an aluminum foil with their stretching axes intersecting each other.
  • the thickness of the L-LDPE polyethylenic polymer layer may be determined depending upon the strength required in correspondence to the weight and packaging form of an article to be wrapped, and may most generally and preferably be in a range of 20 to 100 microns.
  • a thickness departing from that scope may be applied especially where strength is demanded, and bulkiness is to be avoided.
  • Another factor that is important to the two L-LDPE layers is their thickness ratio.
  • thickness ratio of the two L-LDPE polyethylenic polymer layers applied on both sides of an aluminum foil is generally defined in terms of the following equation: ##EQU1##
  • an illustrative example is a L-LDPE base transparent film 1 free from any light-shielding substance which has a thickness of 40 microns, and an L-LDPE base light-shielding film 7 containing a light-shielding substance which has a thickness of 50 microns.
  • the thickness ratio as referred to in the present invention is given by: ##EQU2##
  • the thinner the thickness ratio the better the results will be for the ordinary purpose. In general, that ratio is within 50%, preferably within 30% for easy application. A thickness ratio exceeding 50% is not preferred, since no sufficient improvements are introduced into, especially tear strength, impact perforation strength, Gelbo test strength, resistance to curling, processability, antistatic properties, light shielding properties and drop strength.
  • the aluminum foil used may have a suitable thickness depending upon the article to be packaged, and may have a thickness of about 6 to 15 microns in the case where strength is not particularly required.
  • the three essential layers of the present invention i.e., the aluminum foil and the L-LDPE polyethylenic polymer layers laminated on both sides thereof, at least one of said layers containing 0.5% by weight or more of carbon black, are as discussed above, other layers may be further laminated to form a composite (laminated) film, when carrying out the present invention.
  • thermoplastic films such as, for instance, those of polyethylenes, ethylene copolymeric resins, polypropylenes, polyvinyl chloride, polyvinylidene chloride, polyamide, polycarbonate, fluorine resins, polyester, etc., or modified resins thereof.
  • flexible sheets such as cellulose acetate films, cellophane, polyvinyl alcohol films, paper, aluminum foils, bonded fabrics, cross laminated porous fabrics, foamed sheets of polyethylene, polyurethane and polystyrene, and the like.
  • the foregoing other packaging materials may be used alone or in combination.
  • the preparation of composite films by the lamination of the foregoing other packaging material and the essential three layers according to the present invention may or may not use an adhesive layer(s).
  • use may be made of the heat-bonding methods (hot plate-bonding, impulse bonding, high-frequency bonding and ultrasonic bonding), the methods using bonding agents or adhesives (wet-laminating, dry-laminating, hot-melt laminating, extrusion laminating) and the coextrusion laminating methods.
  • the composite (laminated) films thus obtained are taken as being improved in respect of heat sealability, physical strength, slip properties, antistatic properties, printability, light-shielding properties, appearance, etc.
  • the adhesive includes extrusion laminate type adhesives comprising thermoplastics such as various kinds of polyethylene, ethylene-ethylacrylate copolymer, ethylene-vinyl acetate copolymer, L-LDPE, polypropylene, ionomer and the like; water soluble adhesives, solvent type adhesives, hot melt type adhesives and the like.
  • thermoplastics such as various kinds of polyethylene, ethylene-ethylacrylate copolymer, ethylene-vinyl acetate copolymer, L-LDPE, polypropylene, ionomer and the like
  • water soluble adhesives such as various kinds of polyethylene, ethylene-ethylacrylate copolymer, ethylene-vinyl acetate copolymer, L-LDPE, polypropylene, ionomer and the like
  • water soluble adhesives such as various kinds of polyethylene, ethylene-ethylacrylate copolymer, ethylene-vinyl acetate copolymer, L
  • the packaging materials according to the present invention are best-suited for the packaging of photosensitive materials includes materials.
  • photosensitive materials such as silver halide photosensitive photographic materials, diazo photosensitive photographic materials, photosensitive resins, self-developing type photosensitive materials and diffusion transfer type photosensitive photographic materials and, in addition to such materials, any substance that suffers deterioration upon exposure to humidity and gases.
  • the packaging materials according to the present invention may be applied to the foregoing photosensitive substances in the form of single-sheet flat bags, double-sheet flat bags, bags with a rectangular bottom, self-supporting bags, single-sheet gussetted bags, two-sheet gussetted bags, film sheets, (initial) linings for moistureproof boxes, and reader paper, and in other every known form.
  • photosensitive materials may be packaged by the films of the present invention for the packaging of photosensitive materials.
  • photosensitive materials designated “C” are rolled up thereby, or alternatively sealed and wrapped in various forms of bags prepared therefrom. (See FIGS. 14 to 17).
  • bag-making may rely upon the known plastic film-sealing techniques such as heat sealing, impulse sealing, ultrasonic sealing and high-frequency sealing. Bag-making may be effected with suitable adhesives, tackifiers, etc.
  • a capital S stands for the sealed portion. As illustrated in FIG. 14, the bag may be sealed entirely therearound. Alternatively, the bag may be sealed discretely or partly therearound.
  • the bag may be of every known or other form or layer structure.
  • single-layer flat bags are illustrated in FIGS. 14 and 15, while double-layer gussetted bags comprising inner and outer sheets are shown in FIGS. 16 and 17.
  • the packaging materials according to the present invention are improved in respect of the tear strength, extent of impact perforation, Gelbo test strength, resistance to curling, processability, antistatic properties, light-shielding properties and drop strength, and are thus best-suited as the films for the packaging for photosensitive materials.
  • Control sample C1 is a transparent film which is illustrated in FIG. 1, and is composed of L-LDPE (ULTZ EX 2020L manufactured by Mitsui Petrochemical) of 50 microns in thickness and free from any light-shielding substance.
  • Conventional sample R1 is a light-shielding film layer 2 which is illustrated in FIG. 2, and is composed of LDPE (DFD-0111 manufactured by Nippon Unicar) having a thickness of 70 microns and containing 3% by weight of carbon black.
  • Conventional sample R2 is a laminated film which is shown in FIG. 3, and is obtained by the lamination of a flexible sheet 3 defined by bleached kraft paper of 35 g/m 2 , an LDPE light-shielding layer 2 defined by a high-pressure-processed low-density polyethylene (LDPE) film having a thickness of 70 microns and containing 3.0% by weight of carbon black, LDPE adhesive layers 4 of 15 microns in thickness and an aluminum foil 5 of 7 microns in thickness.
  • Conventional sample R3 is a laminated film similar to that of FIG.
  • the LDPE light-shielding layer 2 is an LDPE film having a thickness of 50 microns and containing 3.0% by weight of carbon black, and a 50 micron-thick LDPE film containing 3.0% by weight of carbon black is further laminated onto the outside of the flexible sheet 3 through another LDPE adhesive layer 4.
  • Control sample C2 is shown in FIG. 4, and is composed of a 50 micron-thick L-LDPE polyethylenic polymer light-shielding film containing 6% by weight of carbon black, 15% by weight of LDPE and 79% by weight of L-LDPE.
  • Conventional sample R4 is a laminated film of a layer structure similar to that of FIG.
  • Control samples C3 (and C5) are laminated films which are shown in FIG. 5, and is composed of a 7 micron-thick aluminum foil 5 having a 70 (and 100) micron-thick L-LDPE polyethylenic polymer light-shielding layer 7 laminated directly onto one side and having a flexible sheet 3 laminated onto the opposite side through a 15 micron-thick LDPE adhesive layer 4, said sheet 3 being defined by bleached kraft paper of 35 g/m 2 .
  • Control sample C4 is shown in FIG.
  • Inventive sample 1 is illustrated in FIG. 7, and is a laminated film composed of a 50 micron-thick L-LDPE polyethylenic polymer light-shielding film 7 containing 6% by weight of carbon black, 15% by weight of LDPE and 79% by weight of L-LDPE and being laminated on the back side of a 7 micron-thick aluminum foil 5 through a 15 micron-thick EEA adhesive layer 4a, and a 40 micron-thick, transparent L-LDPE polyethylenic polymer film 1 containing 15% by weight of LDPE and 85% by weight of L-LDPE and being laminated directly onto the front side of said foil.
  • Inventive sample 2 is sketched in FIG.
  • Inventive sample 4 is sketched in FIG. 9, and is a laminated film obtained by laminating onto the side (to face an article) of a 7 micron-thick aluminum foil a 70 micron-thick L-LDPE polyethylenic polymer light-shielding film 7 containing 3% by weight of carbon black, 7.5% by weight of LDPE and 89.5% of L-LDPE and being separately formed by the inflation method and on the opposite side of said foil 5 a 50 micron-thick L-LDPE polyethylenic polymer light-shielding film 7 having the same composition and being formed by the same method, said lamination being achieved through 15 micron-thick LDPE adhesive layers 4.
  • Inventive sample 5 corresponds to FIG. 10, and is a laminated film obtained in the following manner.
  • a 50 micron-thick, transparent L-LDPE polyethylenic polymer film layer 1 free from any light-shielding substance is laminated directly onto one side of a 7 micron-thick aluminum foil 5.
  • a flexible sheet (bleached kraft paper of 60 g/m 2 ) layer 3a containing 5% by weight of a light shielding substance (carbon black) is laminated thereon through a 15 micron-thick LDPE adhesive layer 4.
  • Inventive sample 6 corresponds to FIG. 11, and is a laminated film obtained in the following manner.
  • a 7 micron-thick aluminum foil 5 is laminated onto the side to face an article with a 50 micron-thick L-LDPE polyethylenic polymer light-shielding film layer 7 formed by the inflation method and containing 3% by weight of a light-shielding substance (aluminum paste), 82% by weight of L-LDPE and 15% by weight of LDPE, said lamination being achieved through a 15 micron-thick EEA (No. 6170 manufactured by Nippon Unicar) adhesive layer 4a containing 3% by weight of a light-shielding substance (carbon black).
  • a light-shielding substance aluminum paste
  • the aluminum foil 5 is laminated on the opposite side with a flexible sheet layer 3 defined by a 20 micron-thick, biaxially stretched polyester film through a 35 micron-thick L-LDPE polyethylenic polymer layer light-shielding film layer 7 containing 2% by weight of carbon black as a light-shielding substance, 30% by weight of LDPE and 68% by weight of L-LDPE.
  • inventive sample 7 is a laminated film obtained in the following manner.
  • a 7 micron-thick aluminum foil 5 is laminated on the side to face an article with a 50 micron-thick L-LDPE polyethylenic polymer light-shielding film layer 7 containing 6% by weight of a light-shielding substance (carbon black) through a 15 micron-thick L-LDPE polyethylenic (45% LDPE+55% L-LDPE) polymer adhesive layer 4b.
  • a 20 micron-thick heat-sealing layer 6 consisting of an ionomer resin (Surlyn manufactured by Du Pont) to prevent the article from being contaminated with the carbon black-containing light-shielding film layer 7 and to afford low-temperature heat sealability.
  • the aluminum foil 5 is laminated, through a 15 micron-thick LDPE adhesive layer 4, on the opposite side with a 50 micron-thick, transparent L-LDPE polyethylenic polymer film layer 1 being obtained from an L-LDPE (ULTZ EX 2020L manufactured by Mitsui Petroleum Chemical Industries Co., Ltd.) resin alone by the inflation method.
  • L-LDPE ULTZ EX 2020L manufactured by Mitsui Petroleum Chemical Industries Co., Ltd.
  • Inventive sample 8 is a double-structure laminated film consisting of an outer sheet A and an inner sheet B.
  • a 15 micron-thick LDPE heat-sealing layer 6 is laminated onto a flexible sheet layer 3 defined by unbleached kraft paper of 70 g/m 2 .
  • a 7 micron-thick aluminum foil 5 is laminated onto both its sides with 50 micron-thick L-LDPE polyethylenic polymer light-shielding film 7 each being separately prepared by the inflation method and being of the composition of 4.5 wt % carbon black, 9.5 wt % LDPE and 86 wt % L-LDPE, said lamination being achieved through 15 micron-thick LDPE adhesive layers 4.
  • This sample is best-suited for the packaging for heavy photosensitive films in the form with a sharp edge or in the rolled form, or heavy rolled photographic paper.
  • This packaging material assures flexible packaging showing excellent physical strength, especially when it is used in the form of a double-sheet flat bag, a two-sheet gussetted bag, etc., as illustrated in FIGS. 16 and 17.
  • Table 1 summarizes the layer structures and properties of the aforesaid conventional samples R1-4, the control samples C1-5, and the inventive samples 1-8.
  • MI melt index
  • LDPE film layer 2 . . .
  • LDPE heat-sealing layer 6 . . .
  • the testing procedures are as follows. Thickness . . . According to JIS P8118
  • Moistureproofness (Moisture Permeability) . . .
  • Photographic films of ASA 100 were placed in bags formed of the respective packaging materials and after for complete sealing were exposed to light of 80,000 luces for one hour to determine and estimate the light-shielding properties thereof in terms of the degree of fogging.
  • An endless bolt of 35 mm in width and 1350 mm in length was formed of the sheet to be tested, and was passed between a 500 g-loading SUS roller and a SUS roller at a speed of 12 m/min. to read the amount of charges on a voltmeter.
  • Hot Tack Properties (Hot-Seal Ability) . . .

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)
  • Packages (AREA)
US07/042,566 1984-03-09 1987-04-24 Packaging films for photosensitive materials Expired - Lifetime US4778712A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP59-43894 1984-03-09
JP59043894A JPS60189438A (ja) 1984-03-09 1984-03-09 写真感光材料包装用フイルム

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US06709805 Continuation 1985-03-08

Publications (1)

Publication Number Publication Date
US4778712A true US4778712A (en) 1988-10-18

Family

ID=12676414

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/042,566 Expired - Lifetime US4778712A (en) 1984-03-09 1987-04-24 Packaging films for photosensitive materials

Country Status (4)

Country Link
US (1) US4778712A (enrdf_load_stackoverflow)
EP (1) EP0154352B1 (enrdf_load_stackoverflow)
JP (1) JPS60189438A (enrdf_load_stackoverflow)
DE (1) DE3575535D1 (enrdf_load_stackoverflow)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4894264A (en) * 1987-04-28 1990-01-16 Fuji Photo Film Co., Ltd. Gusset bag for photographic photosensitive materials
US4903834A (en) * 1986-03-10 1990-02-27 Fuji Photo Film Co., Ltd. Package for thermosensitive recording materials
US4925711A (en) * 1987-12-15 1990-05-15 Fuji Photo Film Co., Ltd. Packaging bag for photosensitive materials and bag-making method thereof
US4950512A (en) * 1983-07-09 1990-08-21 Fuji Photo Film Co., Ltd. Laminated material and formed article for packaging photographic materials
US4977033A (en) * 1988-12-29 1990-12-11 Fuji Photo Film Co., Ltd. Packaging material
US4978572A (en) * 1987-10-05 1990-12-18 Fuji Photo Film Co., Ltd. Laminated film
US4981734A (en) * 1987-07-17 1991-01-01 Fuji Photo Film Co., Ltd. Packaging materials
US4989802A (en) * 1987-11-06 1991-02-05 Fuji Photo Film Co., Ltd. Core for web material
US5023120A (en) * 1988-12-05 1991-06-11 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5026594A (en) * 1988-02-18 1991-06-25 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5055344A (en) * 1988-11-29 1991-10-08 Konica Corporation Material for packaging light-sensitive materials
US5100721A (en) * 1988-11-17 1992-03-31 Fuji Photo Film Co., Ltd. Flat laminated thermoplastic multilayer film and manufacturing method of the same
US5110639A (en) * 1989-07-13 1992-05-05 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5110643A (en) * 1987-01-23 1992-05-05 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5118563A (en) * 1987-09-18 1992-06-02 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
WO1993009946A1 (en) * 1991-11-11 1993-05-27 Shirat Enterprises Ltd. Aluminum with controlled oxidation
US5223311A (en) * 1989-05-22 1993-06-29 Showa Denko K.K. Laminate and process for producing the same
US6071626A (en) * 1996-04-29 2000-06-06 Tetra Laval Holdings & Finance, Sa Multilayer, high barrier laminate
US20040139702A1 (en) * 2001-07-19 2004-07-22 Philip Morris Incorporated Laminated metal foil packaging material and method of making
US20050005285A1 (en) * 2003-07-03 2005-01-06 General Electric Company Method of protecting light sensitive optical article
US20050152624A1 (en) * 2004-01-14 2005-07-14 Versluys Robert T. Pouch having expanded polymer edges
US20100089785A1 (en) * 2006-11-10 2010-04-15 Kai Latvala Package for paper sheets
US20100286630A1 (en) * 2009-05-05 2010-11-11 Watson Laboratories, Inc. Method For Treating Overactive Bladders And A Device For Storage And Administration Of Topical Oxybutynin Compositions
KR200474667Y1 (ko) * 2012-01-20 2014-10-14 이영희 약액 및 배액세트 연결구

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6271631U (enrdf_load_stackoverflow) * 1985-10-24 1987-05-07
JPS62104247U (enrdf_load_stackoverflow) * 1985-12-23 1987-07-03
JPH0428097Y2 (enrdf_load_stackoverflow) * 1986-11-27 1992-07-07
JPS63105142U (enrdf_load_stackoverflow) * 1986-11-27 1988-07-07
JPS63109946U (enrdf_load_stackoverflow) * 1987-01-10 1988-07-15
JP2617927B2 (ja) * 1987-03-13 1997-06-11 富士写真フイルム株式会社 フイルム包装体およびその装填方法
JPH0833623B2 (ja) * 1987-05-20 1996-03-29 富士写真フイルム株式会社 明室装填用感光シートの可撓性防湿・遮光袋
JP2748136B2 (ja) * 1989-01-25 1998-05-06 コニカ株式会社 感光材料用包装材料
EP0384472B1 (en) 1989-02-23 1997-09-10 Fuji Photo Film Co., Ltd. Resin composition and packaging material for photosensitive materials
JP2731939B2 (ja) * 1989-03-09 1998-03-25 富士写真フイルム株式会社 写真感光材料用包装材料
JP2532080Y2 (ja) * 1989-06-26 1997-04-09 大日本印刷株式会社 低臭包装材

Citations (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4147291A (en) * 1976-04-07 1979-04-03 Fuji Photo Film Co., Ltd. Packing bag for light-sensitive material
US4258848A (en) * 1978-07-28 1981-03-31 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials comprising polyolefin layers
DE3105337A1 (de) * 1980-02-15 1981-12-17 Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa Verpackungsmaterial fuer fotosensible materialien
WO1982000020A1 (en) * 1980-06-26 1982-01-07 Nelsonashley D Polyethylene/metal laminates and methods of making same
US4331725A (en) * 1980-06-17 1982-05-25 Fuji Photo Film Co., Ltd. Wrapping materials
US4337285A (en) * 1979-08-23 1982-06-29 Fuji Photo Film Co., Ltd. Wrapping material for light-sensitive materials
US4356224A (en) * 1979-06-01 1982-10-26 Fuji Photo Film Co., Ltd. Wrapping material for photographic light-sensitive material
US4386124A (en) * 1980-08-19 1983-05-31 Fuji Photo Film Co., Ltd. Wrapping materials
GB2117536A (en) * 1982-02-03 1983-10-12 Fuji Photo Film Co Ltd Film for packaging light-sensitive materials
US4411945A (en) * 1980-03-24 1983-10-25 Fuji Photo Film Co., Ltd. Friction sheets
US4411943A (en) * 1980-09-05 1983-10-25 Fuji Photo Film Co., Ltd. Friction sheet
GB2119707A (en) * 1982-04-26 1983-11-23 Fuji Photo Film Co Ltd Materials for packaging light-sensitive materials
US4436809A (en) * 1979-04-18 1984-03-13 Fuji Photo Film Co., Ltd. Method for light-shielding a roll photographic film
US4469741A (en) * 1980-11-04 1984-09-04 Fuji Photo Film Co., Ltd. Laminated sheets
US4565743A (en) * 1983-02-14 1986-01-21 Fuji Photo Film Co., Ltd. Package materials for bundle-wrapping unit cases
US4565733A (en) * 1983-05-02 1986-01-21 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4576865A (en) * 1982-10-13 1986-03-18 Fuji Photo Film Co., Ltd. Materials for packaging light-sensitive materials
US4579781A (en) * 1982-04-07 1986-04-01 Fuji Photo Film Co., Ltd. Material for packaging light-sensitive materials
US4584234A (en) * 1983-07-20 1986-04-22 Fuji Photo Film Co., Ltd. Wrapping materials for photographic materials
US4587175A (en) * 1983-12-28 1986-05-06 Fuji Photo Film Co., Ltd. Laminate sheets
US4629640A (en) * 1984-01-19 1986-12-16 Fuji Photo Film Co., Ltd. Packaging materials for photosensitive materials
US4639386A (en) * 1984-02-03 1987-01-27 Fuji Photo Film Co., Ltd. Container for photographic film cartridge
US4653640A (en) * 1984-09-07 1987-03-31 Fuji Photo Film Co., Ltd. Packaging materials for photosensitive materials and process for producing same
US4661401A (en) * 1984-03-21 1987-04-28 Fuji Photo Film Co., Ltd. Laminated films
US4661395A (en) * 1985-05-21 1987-04-28 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials for photographic purpose
US4663218A (en) * 1984-08-27 1987-05-05 Fuji Photo Film Co., Ltd. Packaging film for photosensitive materials for photographic purpose
US4687692A (en) * 1985-04-15 1987-08-18 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials

Patent Citations (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4147291A (en) * 1976-04-07 1979-04-03 Fuji Photo Film Co., Ltd. Packing bag for light-sensitive material
US4258848A (en) * 1978-07-28 1981-03-31 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials comprising polyolefin layers
US4436809A (en) * 1979-04-18 1984-03-13 Fuji Photo Film Co., Ltd. Method for light-shielding a roll photographic film
US4356224A (en) * 1979-06-01 1982-10-26 Fuji Photo Film Co., Ltd. Wrapping material for photographic light-sensitive material
US4337285A (en) * 1979-08-23 1982-06-29 Fuji Photo Film Co., Ltd. Wrapping material for light-sensitive materials
DE3105337A1 (de) * 1980-02-15 1981-12-17 Fuji Photo Film Co., Ltd., Minami-Ashigara, Kanagawa Verpackungsmaterial fuer fotosensible materialien
US4359499A (en) * 1980-02-15 1982-11-16 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4411945A (en) * 1980-03-24 1983-10-25 Fuji Photo Film Co., Ltd. Friction sheets
US4331725A (en) * 1980-06-17 1982-05-25 Fuji Photo Film Co., Ltd. Wrapping materials
WO1982000020A1 (en) * 1980-06-26 1982-01-07 Nelsonashley D Polyethylene/metal laminates and methods of making same
US4386124A (en) * 1980-08-19 1983-05-31 Fuji Photo Film Co., Ltd. Wrapping materials
US4411943A (en) * 1980-09-05 1983-10-25 Fuji Photo Film Co., Ltd. Friction sheet
US4469741A (en) * 1980-11-04 1984-09-04 Fuji Photo Film Co., Ltd. Laminated sheets
US4452846A (en) * 1982-02-03 1984-06-05 Fuji Photo Film Co., Ltd. Film for packaging light-sensitive materials
GB2117536A (en) * 1982-02-03 1983-10-12 Fuji Photo Film Co Ltd Film for packaging light-sensitive materials
US4579781A (en) * 1982-04-07 1986-04-01 Fuji Photo Film Co., Ltd. Material for packaging light-sensitive materials
GB2119707A (en) * 1982-04-26 1983-11-23 Fuji Photo Film Co Ltd Materials for packaging light-sensitive materials
US4513050A (en) * 1982-04-26 1985-04-23 Fuji Photo Film Co., Ltd. Material for packaging light-sensitive materials
US4576865A (en) * 1982-10-13 1986-03-18 Fuji Photo Film Co., Ltd. Materials for packaging light-sensitive materials
US4565743A (en) * 1983-02-14 1986-01-21 Fuji Photo Film Co., Ltd. Package materials for bundle-wrapping unit cases
US4565733A (en) * 1983-05-02 1986-01-21 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4584234A (en) * 1983-07-20 1986-04-22 Fuji Photo Film Co., Ltd. Wrapping materials for photographic materials
US4587175A (en) * 1983-12-28 1986-05-06 Fuji Photo Film Co., Ltd. Laminate sheets
US4629640A (en) * 1984-01-19 1986-12-16 Fuji Photo Film Co., Ltd. Packaging materials for photosensitive materials
US4639386A (en) * 1984-02-03 1987-01-27 Fuji Photo Film Co., Ltd. Container for photographic film cartridge
US4661401A (en) * 1984-03-21 1987-04-28 Fuji Photo Film Co., Ltd. Laminated films
US4663218A (en) * 1984-08-27 1987-05-05 Fuji Photo Film Co., Ltd. Packaging film for photosensitive materials for photographic purpose
US4653640A (en) * 1984-09-07 1987-03-31 Fuji Photo Film Co., Ltd. Packaging materials for photosensitive materials and process for producing same
US4687692A (en) * 1985-04-15 1987-08-18 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4661395A (en) * 1985-05-21 1987-04-28 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials for photographic purpose

Cited By (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4950512A (en) * 1983-07-09 1990-08-21 Fuji Photo Film Co., Ltd. Laminated material and formed article for packaging photographic materials
US4903834A (en) * 1986-03-10 1990-02-27 Fuji Photo Film Co., Ltd. Package for thermosensitive recording materials
US5110643A (en) * 1987-01-23 1992-05-05 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4894264A (en) * 1987-04-28 1990-01-16 Fuji Photo Film Co., Ltd. Gusset bag for photographic photosensitive materials
US4981734A (en) * 1987-07-17 1991-01-01 Fuji Photo Film Co., Ltd. Packaging materials
US5082744A (en) * 1987-07-17 1992-01-21 Fuji Photo Film Co., Ltd. Packaging materials
US5118563A (en) * 1987-09-18 1992-06-02 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4978572A (en) * 1987-10-05 1990-12-18 Fuji Photo Film Co., Ltd. Laminated film
US4989802A (en) * 1987-11-06 1991-02-05 Fuji Photo Film Co., Ltd. Core for web material
US5414032A (en) * 1987-11-06 1995-05-09 Fuji Photo Film Co., Ltd. Resin composition for a core for web material
US4925711A (en) * 1987-12-15 1990-05-15 Fuji Photo Film Co., Ltd. Packaging bag for photosensitive materials and bag-making method thereof
US5026594A (en) * 1988-02-18 1991-06-25 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US5100721A (en) * 1988-11-17 1992-03-31 Fuji Photo Film Co., Ltd. Flat laminated thermoplastic multilayer film and manufacturing method of the same
US5055344A (en) * 1988-11-29 1991-10-08 Konica Corporation Material for packaging light-sensitive materials
US5023120A (en) * 1988-12-05 1991-06-11 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
US4977033A (en) * 1988-12-29 1990-12-11 Fuji Photo Film Co., Ltd. Packaging material
US5223311A (en) * 1989-05-22 1993-06-29 Showa Denko K.K. Laminate and process for producing the same
US5110639A (en) * 1989-07-13 1992-05-05 Fuji Photo Film Co., Ltd. Packaging material for photosensitive materials
WO1993009946A1 (en) * 1991-11-11 1993-05-27 Shirat Enterprises Ltd. Aluminum with controlled oxidation
AU656647B2 (en) * 1991-11-11 1995-02-09 Goldmuntz, Lawrence Aluminum with controlled oxidation
US6071626A (en) * 1996-04-29 2000-06-06 Tetra Laval Holdings & Finance, Sa Multilayer, high barrier laminate
US7857128B2 (en) 2001-07-19 2010-12-28 Philip Morris Usa Inc. Laminated metal foil packaging material and method of making
US20040139702A1 (en) * 2001-07-19 2004-07-22 Philip Morris Incorporated Laminated metal foil packaging material and method of making
US20050005285A1 (en) * 2003-07-03 2005-01-06 General Electric Company Method of protecting light sensitive optical article
WO2005007527A1 (en) * 2003-07-03 2005-01-27 General Electric Company Method of protecting light sensitive optical article
US20050152624A1 (en) * 2004-01-14 2005-07-14 Versluys Robert T. Pouch having expanded polymer edges
US20100089785A1 (en) * 2006-11-10 2010-04-15 Kai Latvala Package for paper sheets
US20100286630A1 (en) * 2009-05-05 2010-11-11 Watson Laboratories, Inc. Method For Treating Overactive Bladders And A Device For Storage And Administration Of Topical Oxybutynin Compositions
WO2010129498A3 (en) * 2009-05-05 2011-03-03 Watson Laboratories, Inc. A method for treating overactive bladders and a device for storage and administration of topical oxybutynin compositions
US8920392B2 (en) 2009-05-05 2014-12-30 Watson Laboratories, Inc. Method for treating overactive bladders and a device for storage and administration of topical oxybutynin compositions
US9259388B2 (en) 2009-05-05 2016-02-16 Watson Pharmaceuticals, Inc. Method for treating overactive bladders and a device for storage and administration of topical oxybutynin compositions
US10449173B2 (en) 2009-05-05 2019-10-22 Allergan Sales, Llc Method for treating overactive bladders and a device for storage and administration of topical oxybutynin compositions
KR200474667Y1 (ko) * 2012-01-20 2014-10-14 이영희 약액 및 배액세트 연결구

Also Published As

Publication number Publication date
JPH0548174B2 (enrdf_load_stackoverflow) 1993-07-20
JPS60189438A (ja) 1985-09-26
EP0154352A2 (en) 1985-09-11
EP0154352B1 (en) 1990-01-24
EP0154352A3 (en) 1987-03-11
DE3575535D1 (de) 1990-03-01

Similar Documents

Publication Publication Date Title
US4778712A (en) Packaging films for photosensitive materials
US4629640A (en) Packaging materials for photosensitive materials
US4661401A (en) Laminated films
US4687692A (en) Packaging material for photosensitive materials
US4784906A (en) Packaging material for photosensitive materials for photographic purpose
US4663218A (en) Packaging film for photosensitive materials for photographic purpose
US4661395A (en) Packaging material for photosensitive materials for photographic purpose
US4653640A (en) Packaging materials for photosensitive materials and process for producing same
US4513050A (en) Material for packaging light-sensitive materials
US4871613A (en) Packaging material
EP0508489B1 (en) Packaging material for photosensitive materials
US4708896A (en) Easily openable packaging material for photographic photosensitive materials
US4701359A (en) Packaging material for photosensitive materials
US4780357A (en) Packaging material for photosensitive materials for photographic purposes
US4576865A (en) Materials for packaging light-sensitive materials
US4876129A (en) Packaging material for photographic photosensitive materials
JPS58132555A (ja) 感光物質包装用フイルム
US4978572A (en) Laminated film
US5110643A (en) Packaging material for photosensitive materials
US5075163A (en) Packaging material for photographic photosensitive materials
US5026600A (en) Packaging material for photosensitive materials
JPS61179738A (ja) 感光物質用包装材料
JPS61237640A (ja) 写真感光材料用包装材料
JPH0477893B2 (enrdf_load_stackoverflow)
JPH0717068Y2 (ja) 感光物質用包装材料

Legal Events

Date Code Title Description
FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

FPAY Fee payment

Year of fee payment: 12